. >> reporter: cnn has learned that the obama administration was warned in september that the. [ kaye website wasn't ready to go live. the main contractor cgi issued this confidential report to the agency overseeing the healthcare.gov rollout. it warned of a number of open risks for the website. the report gave the highest priority to things in plain language like we don't have access to monitoring tools. not enough time and schedule to conduct adequate performance testing. and hub services are intermittently unavailable. short for the site's not working sometimes. cgi saying back in september they were putting a team in place to alert whenever the hub goes down. up on capitol hill tuesday, the head of cms, the agency that received that report, kicked off testimony by saying she's sorry. >> we know that consumers are eagle tore purchase this coverage and to the millions of americans who have attempted to use health dare caught govern to shop and enroll in health care coverage, i want to apologize to you that the website has not worked as well as it should. >> reporter: marilyn tavenne